<header id="header-btns" style="margin: 16px 0;">
    <str-btn data-action="back">撤回</str-btn>
    <str-btn data-action="prev">前进</str-btn>
    <str-btn data-action="save">保存</str-btn>
    <str-btn data-action="create">生成</str-btn>
    <str-btn data-action="preview">预览</str-btn>
    <str-btn data-action="backpreview">退出预览</str-btn>
</header>